11 Great Moments From The Eleventh Doctor's First Season
8. Confronting The Dream Lord In "Amy's Choice"
Psychic pollen creates a darker version of the Doctor, who calls himself the Dream Lord. He creates a scenario of dreams and challenges the Doctor, Amy, and Rory to determine which scenario is real.
In many ways he is a prototype Valeyard; he is the dark reflection of the Doctor. But the Doctor knows himself better than anyone else, and he is able to guess the answer to the Dream Lord's game before it's too late.